Antenna



FIG. 1 is a top perspective view of the antenna;

FIG. 2 is a bottom perspective view of the antenna;

FIG. 3 is a top elevation view of the antenna;

FIG. 4 is a bottom elevation view of the antenna;

FIG. 5 is a front elevation view of the antenna;

FIG. 6 is a rear elevation view of the antenna;

FIG. 7 is a left elevation view of the antenna; and,

FIG. 8 is a right side elevation view of the antenna.

The broken lines illustrate portions of the antenna and form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 